The 2005 V8 Supercar Championship Series was a motor racing championship for V8 Supercars. The series, which was the seventh V8 Supercar Championship Series, began on 18 March 2005 in Adelaide and ended on 27 November at Phillip Island Grand Prix Circuit after 13 rounds. The 46th Australian Touring Car Championship title was awarded to the series winner, Russell Ingall by the Confederation of Australian Motor Sport.